增加断开mqtt的方法

src/plugins/MMCMQTT/store.js

@@ -89,6 +89,13 @@ export default {
       });
     },
     /**
+     * 断开mqtt连接
+     * @param {} param0 
+     */
+    end({ state }){
+      state.client.end();
+    },
+    /**
      * 订阅
      * @param {*} topic
      * @param {*} callback

vue2/src/views/mqtt/demo.vue

@@ -49,6 +49,9 @@ export default {
     }
     console.log('mqtt连接成功');
   },
+  beforeDestroy(){
+    this.$store.dispatch('MMCMQTT/end')
+  },
   methods: {
     subscribe(){
       this.$store.dispatch('MMCMQTT/subscribe', {